What is a piss elm tree?

The piss elm, scientifically known as Ulmus pumila, is a species of elm tree native to Asia and parts of Europe. It is often recognized for its fast growth and resilience to harsh conditions, making it a popular choice for urban landscaping. The name "piss elm" comes from the tree's sap, which has a strong odor reminiscent of urine. This tree is also valued for its wood, used in various applications, including furniture and flooring.